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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
// The ext-* files are imported into the same scopes.
/* import-globals-from ext-toolkit.js */
// Manages an alarm created by the extension (alarms API).
class Alarm {
constructor(api, name, alarmInfo) {
this.api = api;
this.name = name;
this.when = alarmInfo.when;
this.delayInMinutes = alarmInfo.delayInMinutes;
this.periodInMinutes = alarmInfo.periodInMinutes;
this.canceled = false;
let delay, scheduledTime;
if (this.when) {
scheduledTime = this.when;
delay = this.when - Date.now();
} else {
if (!this.delayInMinutes) {
this.delayInMinutes = this.periodInMinutes;
}
delay = this.delayInMinutes * 60 * 1000;
scheduledTime = Date.now() + delay;
}
this.scheduledTime = scheduledTime;
let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
delay = delay > 0 ? delay : 0;
timer.init(this, delay, Ci.nsITimer.TYPE_ONE_SHOT);
this.timer = timer;
}
clear() {
this.timer.cancel();
this.api.alarms.delete(this.name);
this.canceled = true;
}
observe(subject, topic, data) {
if (this.canceled) {
return;
}
for (let callback of this.api.callbacks) {
callback(this);
}
if (!this.periodInMinutes) {
this.clear();
return;
}
let delay = this.periodInMinutes * 60 * 1000;
this.scheduledTime = Date.now() + delay;
this.timer.init(this, delay, Ci.nsITimer.TYPE_ONE_SHOT);
}
get data() {
return {
name: this.name,
scheduledTime: this.scheduledTime,
periodInMinutes: this.periodInMinutes,
};
}
}
this.alarms = class extends ExtensionAPIPersistent {
constructor(extension) {
super(extension);
this.alarms = new Map();
this.callbacks = new Set();
}
onShutdown() {
for (let alarm of this.alarms.values()) {
alarm.clear();
}
}
PERSISTENT_EVENTS = {
onAlarm({ fire }) {
let callback = alarm => {
fire.sync(alarm.data);
};
this.callbacks.add(callback);
return {
unregister: () => {
this.callbacks.delete(callback);
},
convert(_fire, context) {
fire = _fire;
},
};
},
};
getAPI(context) {
const self = this;
return {
alarms: {
create: function (name, alarmInfo) {
name = name || "";
if (self.alarms.has(name)) {
self.alarms.get(name).clear();
}
let alarm = new Alarm(self, name, alarmInfo);
self.alarms.set(alarm.name, alarm);
},
get: function (name) {
name = name || "";
if (self.alarms.has(name)) {
return Promise.resolve(self.alarms.get(name).data);
}
return Promise.resolve();
},
getAll: function () {
let result = Array.from(self.alarms.values(), alarm => alarm.data);
return Promise.resolve(result);
},
clear: function (name) {
name = name || "";
if (self.alarms.has(name)) {
self.alarms.get(name).clear();
return Promise.resolve(true);
}
return Promise.resolve(false);
},
clearAll: function () {
let cleared = false;
for (let alarm of self.alarms.values()) {
alarm.clear();
cleared = true;
}
return Promise.resolve(cleared);
},
onAlarm: new EventManager({
context,
module: "alarms",
event: "onAlarm",
extensionApi: self,
}).api(),
},
};
}
};
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